[gnote] Fix runtime warning with markup in fixed width addin

[Aurimas Äernius <aurimasc src gnome org>]

commit c308e1209de53faf6c9e5ba75a66546ea6c86cf8
Author: Aurimas Äernius <aurisc4 gmail com>
Date:   Fri Sep 21 22:37:33 2012 +0300

    Fix runtime warning with markup in fixed width addin

 src/addins/fixedwidth/fixedwidthmenuitem.cpp |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/addins/fixedwidth/fixedwidthmenuitem.cpp b/src/addins/fixedwidth/fixedwidthmenuitem.cpp
index e702d2c..892a156 100644
--- a/src/addins/fixedwidth/fixedwidthmenuitem.cpp
+++ b/src/addins/fixedwidth/fixedwidthmenuitem.cpp
@@ -31,8 +31,8 @@
 namespace fixedwidth {
 
   FixedWidthMenuItem::FixedWidthMenuItem(gnote::NoteAddin *addin)
-    : Gtk::CheckMenuItem(Glib::ustring("<span font_family=\"monospace\">")
-                         + _("Fixed Wid_th") + "</span>", true)
+    : Gtk::CheckMenuItem(Glib::ustring("<tt>")
+                         + _("Fixed Wid_th") + "</tt>", true)
     , m_note_addin(addin)
     , m_event_freeze(false)
   {